Where does underground music live? Just ask Daniel Shea, one of the founders of Boston Hassle, the organization responsible for Hassle Fest. Now in its fifth year, Hassle Fest is a music festival featuring over 40 local and national acts including Prince Rama, Japanther, Black Dice, and Speedy Ortiz. On paper, the lineup of this festival might not ring the bells of your average music fan, but that might just be the point. Hassle Fest 5 runs Friday and Saturday at Cambridge Elks Lodge.